Add Dockerfile: Astro build + Express + SES

Dockerfile

@@ -0,0 +1,29 @@
+# ── MoreminiMore — Astro + Express + SES ─────────────────────────
+# Build: npm run build  →  Runtime: node server.js (port 4321)
+#
+# Env vars:
+#   SES_ACCESS_KEY_ID      (optional — SES email sending)
+#   SES_SECRET_ACCESS_KEY  (optional)
+#   SES_REGION             (default: ap-southeast-1)
+#   PORT                   (default: 4321)
+
+FROM node:22-bookworm-slim
+
+WORKDIR /app
+
+# ── Dependencies ──────────────────────────────────────────────────
+COPY package.json package-lock.json ./
+RUN npm ci --omit=dev 2>/dev/null || npm ci
+
+# ── Source + Build ───────────────────────────────────────────────
+COPY . .
+RUN npm run build
+
+# ── Prune build-only deps (astro is ~200MB) ──────────────────────
+# Keep: express, cors, nodemailer, @aws-sdk/client-ses
+RUN npm prune --omit=dev 2>/dev/null; \
+    npm ls --depth=0 2>/dev/null || true
+
+# ── Runtime ──────────────────────────────────────────────────────
+EXPOSE 4321
+CMD ["node", "server.js"]